Answer
Objects B and C repel each other.
Work Step by Step
Objects A and B attract each other which means that object A and object B are oppositely charged.
Objects A and C also attract each other which means that object A and object C are also oppositely charged.
Which implies that object B and object C are charged with the same polarity.
And as we know that like charges repel and unlike charges attract each other.
Therefore, object B and object C repel each other.
